2014 Volume 55 Issue 2 Pages 391-394
Nanopowders of Mo, Nb, and Si were fabricated by high-energy ball milling. A dense nanostructured MoSi2–NbSi2 composite was rapidly synthesized and sintered by the pulsed current activated heating method within four minutes using mechanically activated powders of Mo, Nb, and Si. A high-density nanostructured MoSi2–NbSi2 composite was produced under simultaneous application of an 80-MPa pressure and a pulsed current. The sintering behavior, mechanical properties, and microstructure of the composite were investigated. These fracture toughness and hardness values of the nanostructured 0.5MoSi2–0.5NbSi2 composite are higher than those of monolithic MoSi2 or NbSi2.